2. Life expectancy - a wood porch will last longer (if properly
maintained it can last up to 50 years)

3. Maintenance - a wood porch has to be waterproofed every 1-3 years. A
metal porch has to be sandblasted and painted to avoid rusting. This
process can be extremely time-consuming and expensive if performed in
the field.

4. Convenience
- a metal porch will heat up like an oven in the summer. A wood porch
will not.

5. Appearance - a steel porch has an industrial, very rough look.

6. Application - a wood porch can be constructed on buildings up to 3
floors (4 if you count an English basement). Steel - no restrictions.

The choice belongs to the building owner.
The Porch People will be happy to provide you an estimate for both.